VDrift is a free and open-source car driving simulation game that focuses primarily on drift racing. The game has very realistic driving physics, and features over 45 tracks, 39 cars based on real-life production models, beautiful graphics & scenery, fully customizable controls, support for game controllers and steering wheels, and much more.
Mac OS X 10.4 or newer
Intel or PowerPC powered Mac (1 GHz or faster)
64 MB graphics card
Free download at vdrift.net